1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this artist was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376383a783c0f64656d23ca2d686bdbf59f0ba362acac25cec09786bb99d3ee1. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1c877aa5-5fcc-4740-ac40-2a6d5998ee69.json and https://artists.proofprofile.net/proofs/artist/1c877aa5-5fcc-4740-ac40-2a6d5998ee69.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
30 Years of Pride - A Tribute to James Blundell